Digital multimeter is a kind of digital measurement instrument which has many applications. The digital multimeter has the function like ammeter, voltmeter, ohmmeter and others. 

Digital multimater has the portable unit which used for basic fault diagnosis and bigger size unit which can be placed on workbench. It is the digital instrument during electrical measurements. It also has many special function such as measuring voltage, resistance and current. As the multi-purpose digital measuring instrument, it is usually used in physics, electric and electron measuring areas.